US4869085A - Cylinder lock and key - Google Patents

Cylinder lock and key Download PDF

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Publication number
US4869085A
US4869085A US07/055,724 US5572487A US4869085A US 4869085 A US4869085 A US 4869085A US 5572487 A US5572487 A US 5572487A US 4869085 A US4869085 A US 4869085A
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US
United States
Prior art keywords
key
cylinder
lock
energy
shape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/055,724
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English (en)
Inventor
Peter E. Meissner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US4869085A publication Critical patent/US4869085A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B19/00—Keys; Accessories therefor
    • E05B19/18—Keys adjustable before use
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B51/00—Operating or controlling locks or other fastening devices by other non-mechanical means
    • E05B51/005—Operating or controlling locks or other fastening devices by other non-mechanical means by a bimetallic or memory-shape element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7441—Key
    • Y10T70/7486—Single key
    • Y10T70/7508—Tumbler type
    • Y10T70/7559—Cylinder type
    • Y10T70/7565—Plural tumbler sets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7441—Key
    • Y10T70/778—Operating elements
    • Y10T70/7791—Keys
    • Y10T70/7842—Single shank or stem
    • Y10T70/787—Irregular nonplanar or undulated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7441—Key
    • Y10T70/778—Operating elements
    • Y10T70/7791—Keys
    • Y10T70/7881—Bitting

Definitions

  • the present invention relates generally to a cylinder lock and a key, the lock having lock pins arranged in a cylinder core to read control faces of the key.
  • German Pat. No. 24 11 362 (DE-PS No. 24 11 362) for example, discloses a cylinder lock and a key having auxiliary longitudinal ribs projecting beyond one or more lateral faces of the flat key.
  • the auxiliary longitudinal ribs cooperate with auxiliary lock pins so that the lock pins sense the ribs.
  • U.S. Pat. No. 4,325,242 including discontinuous rib members at each side of an elongated key.
  • U.S. Pat. No. 4,608,842 also discloses a lock and key system with auxiliary locking ribs and pins.
  • EP-PA No. 00 29 498 is disclosed the sensing of the height of a profile or a sub-profile, the height initially being defined by the inserted key. This occurs due to a radially displaceable ball seated in a bore of the key shank.
  • metals and metal alloys have what is referred to as memory or thermal recovery or shape memory.
  • the metals and alloys displaying such characteristic have a first shape at normal ambient temperatures but assume a modified second shape as a function of the energy received in the form of heat, for example.
  • a pilotherm, or temperature switch operating on this principle is known from German utility model No. 79 00 875.
  • Memory alloys are known from practice and include, for example, NiTi which is used for pressure, tensile, bending or torsion elements.
  • An object of the present invention is to increase the nature and number of keying variation possibilities in a cylinder lock and key.
  • a further object of the present invention is to provide a cylinder lock and key using shape memory, or heat recoverable, metals or metal alloys to exploit variable shapes developed in response to energy input as a keying variable.
  • a cylinder lock and key having portions of the key forming pin controlling faces, the portions being of a material with a shape memory. Energy is applied to the control faces to cause the shape memory material to respond so that the control faces assume a height needed for alignment of the lock pins.
  • a plurality of longitudinal ribs or ribs sections of memory material ar provided to form the control faces.
  • a microswitch to initiate the energy application when the key is inserted into the cylinder core is also preferably included.
  • a particular advantage of the invention is that the key does not show in any way whatsoever the height required of the rib or rib sections to produce alignment of the lock pins with the parting line between the cylinder core and the cylinder housing. This is due to the fact that the height of the rib sections when in the cold condition is not the same as the height required of the rib sections for alignment of the lock pins. Moreover, the required height cannot be identified by an unauthorized user by trial and error, for example, by heating the key in an external source of thermal energy, because the energy application which is required to achieve a defined response of the shape memory material cannot be designationally applied in this way.
  • FIG. 1 is an enlarged plan view showing the spine of a flat key with lock pins abutting longitudinal ribs, as well as showing a parting line between a lock cylinder and a cylinder housing.
  • FIG. 2 is a fragmentary perspective view of the key shown in FIG. 1.
  • a portion of a flat key 1 is shown including a key handle or base 4.
  • a plurality of longitudinal ribs, or rib portions, project from lateral faces of the flat key 1, only rib portions 2 and 3 being shown for simplicity.
  • the height of the rib sections 2 and 3 when in the cold condition is shown in phantom, while the solid outline of the rib sections 2 and 3 indicate the condition assumed by the ribs 2 and 3 when the shape memory or heat recoverable metal or metal alloy of which the ribs are formed responds to the application of energy.
  • the plurality of rib portions have mutually different shape memories. As is shown schematically the energy can be applied either externally, such as from the lock portion, or internally, such as from the key itself.
  • An energy source H is shown schematically either in the key handle 4, or alternately in the lock cylinder housing 8.
  • a microswitch M provides energy to the ribs, and is actuated in a preferred embodiment by insertion of the key into the lock. The energy in the illustrated embodiment is by resistance heating when current is supplied directly to the ribs.
  • Lock pins 5 are shown, as well as a parting line 6 between a cylinder core 7 and a cylinder housing 8 of the cylinder lock.
  • the lock pins 5 are slidably mounted in channels 10 in the cylinder core 7.
  • the energy source H for applying energy application to the ribs 2 and 3 is mounted either in the lock portion, or alternately in the key 1 itself.
  • the key handle 4 is a suitable location for mounting the energy source H. It is contemplated that different ribs are connected to receive different amounts of energy necessary to achieve their respective pre-selected lock actuating heights.
  • a high security key is provided for use in a cylinder lock, the key having portions that change shape in response to selective energy application.

Landscapes

  • Lock And Its Accessories (AREA)
  • Switches With Compound Operations (AREA)
US07/055,724 1986-05-29 1987-05-29 Cylinder lock and key Expired - Fee Related US4869085A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3618074A DE3618074C1 (de) 1986-05-29 1986-05-29 Schliesszylinder mit Schluessel
DE3618074 1986-05-29

Publications (1)

Publication Number Publication Date
US4869085A true US4869085A (en) 1989-09-26

Family

ID=6301872

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/055,724 Expired - Fee Related US4869085A (en) 1986-05-29 1987-05-29 Cylinder lock and key

Country Status (4)

Country Link
US (1) US4869085A (de)
EP (1) EP0247966B1 (de)
AT (1) ATE47613T1 (de)
DE (1) DE3618074C1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998003754A1 (en) * 1996-07-19 1998-01-29 International Security Products, Inc. Lock system with key trapping
WO1998036142A1 (en) * 1997-02-14 1998-08-20 Medeco Security Locks, Inc. Electromechanical cylinder lock
US5823030A (en) * 1997-01-29 1998-10-20 International Security Products, Inc. Cylinder lock system
US6119496A (en) * 1998-10-07 2000-09-19 International Security Products, Inc. Keys for high security cylinder lock systems
US6125674A (en) * 1996-04-18 2000-10-03 Talleres De Escoriaza, S.A. System consisting of a noncopyable key and a closed cylinder for same
DE102004052930B3 (de) * 2004-10-29 2006-03-30 Bks Gmbh Sicherheitsschlüssel
US20070119218A1 (en) * 2005-10-28 2007-05-31 Searete Llc Adaptive engaging assembly
US20070119164A1 (en) * 2005-10-28 2007-05-31 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Self assembling/quick assembly structure using shape memory alloy materials
US20130091910A1 (en) * 2011-10-12 2013-04-18 Moshe Dolev Cylinder lock assembly with non-rotating elements
US11124991B2 (en) * 2016-07-18 2021-09-21 Bae Systems Plc Lock for a tamper resistant assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3272973A1 (de) * 2016-07-18 2018-01-24 BAE SYSTEMS plc Schloss für manipulationssichere anordnung

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE354058C (de) * 1922-06-01 Friedrich Weise Schluessel mit einseitig federndem Doppelbart und dazugehoerigem Schloss
US2105304A (en) * 1937-02-20 1938-01-11 Clementine De Giuli Electric lock
US2116246A (en) * 1934-06-20 1938-05-03 Macdonald Robert Lock and switch device
US2763027A (en) * 1955-07-29 1956-09-18 Melvin L Tampke Impression type lock decoder
US3022408A (en) * 1960-10-25 1962-02-20 Robert W Wagner Electrically heated key
US3541818A (en) * 1968-07-05 1970-11-24 Eugene Dana Key
US3668909A (en) * 1970-05-28 1972-06-13 Locking Systems Inc Settable key and coding mechanism therefor
DE2411362A1 (de) * 1974-03-09 1975-09-18 Zeiss Ikon Ag Drehzylinderschloss mit flachschluessel
DE7900875U1 (de) * 1981-10-22 BBC AG Brown, Boveri & Cie., 5401 Baden, Aargau Thermoschalter
US4325242A (en) * 1977-08-25 1982-04-20 Zeiss Ikon Ag Goerzwerk Multi-level lock system and method
FR2492872A1 (fr) * 1980-08-13 1982-04-30 Vachette Sa Cle a poussoir incorpore et barillet de surete utilisant ladite cle
EP0029498B1 (de) * 1979-11-24 1982-10-20 DOM-Sicherheitstechnik GmbH & Co. KG Zylinderschloss mit Flachschlüssel
US4400956A (en) * 1981-08-05 1983-08-30 Martin & Starchuk Limited Skeleton key kit
WO1983003439A1 (en) * 1982-03-23 1983-10-13 Chicago Lock Co Key and method of manufacture
US4433487A (en) * 1982-02-26 1984-02-28 All-Lock Electronics, Inc. Key reading system
US4608842A (en) * 1984-06-25 1986-09-02 Zeiss Ikon Ag Lock and key system
DE3542008A1 (de) * 1985-11-28 1987-06-04 Dom Sicherheitstechnik Schluessel fuer schliesszylinder
US4712398A (en) * 1986-03-21 1987-12-15 Emhart Industries, Inc. Electronic locking system and key therefor
US4726205A (en) * 1985-03-16 1988-02-23 Vdo Adolf Schindling Ag Ignition key with transmitter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888817A (en) * 1956-02-20 1959-06-02 David B Buck Pressure and magnetic key blank for locks

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7900875U1 (de) * 1981-10-22 BBC AG Brown, Boveri & Cie., 5401 Baden, Aargau Thermoschalter
DE354058C (de) * 1922-06-01 Friedrich Weise Schluessel mit einseitig federndem Doppelbart und dazugehoerigem Schloss
US2116246A (en) * 1934-06-20 1938-05-03 Macdonald Robert Lock and switch device
US2105304A (en) * 1937-02-20 1938-01-11 Clementine De Giuli Electric lock
US2763027A (en) * 1955-07-29 1956-09-18 Melvin L Tampke Impression type lock decoder
US3022408A (en) * 1960-10-25 1962-02-20 Robert W Wagner Electrically heated key
US3541818A (en) * 1968-07-05 1970-11-24 Eugene Dana Key
US3668909A (en) * 1970-05-28 1972-06-13 Locking Systems Inc Settable key and coding mechanism therefor
DE2411362A1 (de) * 1974-03-09 1975-09-18 Zeiss Ikon Ag Drehzylinderschloss mit flachschluessel
US4325242A (en) * 1977-08-25 1982-04-20 Zeiss Ikon Ag Goerzwerk Multi-level lock system and method
EP0029498B1 (de) * 1979-11-24 1982-10-20 DOM-Sicherheitstechnik GmbH & Co. KG Zylinderschloss mit Flachschlüssel
FR2492872A1 (fr) * 1980-08-13 1982-04-30 Vachette Sa Cle a poussoir incorpore et barillet de surete utilisant ladite cle
US4400956A (en) * 1981-08-05 1983-08-30 Martin & Starchuk Limited Skeleton key kit
US4433487A (en) * 1982-02-26 1984-02-28 All-Lock Electronics, Inc. Key reading system
WO1983003439A1 (en) * 1982-03-23 1983-10-13 Chicago Lock Co Key and method of manufacture
US4608842A (en) * 1984-06-25 1986-09-02 Zeiss Ikon Ag Lock and key system
US4726205A (en) * 1985-03-16 1988-02-23 Vdo Adolf Schindling Ag Ignition key with transmitter
DE3542008A1 (de) * 1985-11-28 1987-06-04 Dom Sicherheitstechnik Schluessel fuer schliesszylinder
US4712398A (en) * 1986-03-21 1987-12-15 Emhart Industries, Inc. Electronic locking system and key therefor

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6125674A (en) * 1996-04-18 2000-10-03 Talleres De Escoriaza, S.A. System consisting of a noncopyable key and a closed cylinder for same
US5819567A (en) * 1996-07-19 1998-10-13 International Security Products, Inc. Lock system with key trapping
US5970761A (en) * 1996-07-19 1999-10-26 International Security Products, Inc. Lock system with key trapping
WO1998003754A1 (en) * 1996-07-19 1998-01-29 International Security Products, Inc. Lock system with key trapping
AU725728B2 (en) * 1996-07-19 2000-10-19 International Security Products, Inc. Lock system with key trapping
US5823030A (en) * 1997-01-29 1998-10-20 International Security Products, Inc. Cylinder lock system
US7690231B1 (en) * 1997-02-14 2010-04-06 Medeco Security Lock, Inc. Electromechanical cylinder lock
WO1998036142A1 (en) * 1997-02-14 1998-08-20 Medeco Security Locks, Inc. Electromechanical cylinder lock
US9920551B2 (en) 1997-02-14 2018-03-20 Assa Abloy High Security Group Inc. Electromechanical cylinder lock
US6119496A (en) * 1998-10-07 2000-09-19 International Security Products, Inc. Keys for high security cylinder lock systems
DE102004052930B3 (de) * 2004-10-29 2006-03-30 Bks Gmbh Sicherheitsschlüssel
US20070119164A1 (en) * 2005-10-28 2007-05-31 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Self assembling/quick assembly structure using shape memory alloy materials
WO2007053529A3 (en) * 2005-10-28 2008-01-10 Searete Llc Adaptive engaging assembly
GB2446092A (en) * 2005-10-28 2008-07-30 Searete Llc Adaptive engaging assembly
US7469538B2 (en) 2005-10-28 2008-12-30 Searete Llc Self assembling/quick assembly structure using shape memory alloy materials
US20090071146A1 (en) * 2005-10-28 2009-03-19 Searete Llc Self assembling/quick assembly structure using shape memory alloy materials
US20070119218A1 (en) * 2005-10-28 2007-05-31 Searete Llc Adaptive engaging assembly
GB2446092B (en) * 2005-10-28 2011-11-23 Searete Llc Adaptive engaging assembly
US8146357B2 (en) 2005-10-28 2012-04-03 The Invention Science Fund I Llc Self assembling/quick assembly structure using shape memory alloy materials
US20130091910A1 (en) * 2011-10-12 2013-04-18 Moshe Dolev Cylinder lock assembly with non-rotating elements
US8820129B2 (en) * 2011-10-12 2014-09-02 Moshe Dolev Cylinder lock assembly with non-rotating elements
US11124991B2 (en) * 2016-07-18 2021-09-21 Bae Systems Plc Lock for a tamper resistant assembly

Also Published As

Publication number Publication date
EP0247966A3 (en) 1988-05-11
EP0247966A2 (de) 1987-12-02
ATE47613T1 (de) 1989-11-15
DE3618074C1 (de) 1988-01-07
EP0247966B1 (de) 1989-10-25

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REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19930926

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362